28 Jan
2010
28 Jan
'10
8:24 p.m.
Hi Steve,
Let the background polygon (type 0x4b) cover the whole map area.
I forgot to say when this patch came out: what if the polygon really is too big?
Garmin maps may only have one, but they also presumably make sure that tiles are not too big, whereas I'm not sure that we do in low feature density areas.
As far as I am aware, the limiting factor to the size of the 0x4b poly (in mkgmap) is the number of bits used to encode the sequence of points and, correct me if I am wrong, that is dynamically worked out based on the range of values required. If it proves to be problematic, let's just revert that commit because it's not a vital tweak. Mark